A Compact and Highly Efficient SOI Polarization Splitter and Rotator based on a Bow-tie Structure

Abstract

We propose a compact and highly-efficient polarization splitter and rotator based on a new bow-tie converter (TM0. to TE1). It is composed by a directional coupler, a TM0 to TE1 and a TE1 to TE0 mode converters. Simulation results predict an insertion loss of $0.6 \mathrm{~dB}$, a polarization conversion loss of 0.4 dB and a crosstalk level lower than $-22 \mathrm{~dB}$ for the $1528-1570 \mathrm{nm}$ wavelength range, for a compact device $(55 \mu \mathrm{m})$